Yantrana, the Rogue Paladin

Vigilance, flanking
{1}{p/u}{p/w}: target creature blocks additional creature
this turn.
Whenever Yantrana, the Rogue Paladin enters
the battlefield, each player may sacrifice a
nonland permanent and gain life equal to it's converted mana cost then draw a card. Whenever
Yantrana leaves the battlefield, each opponent
loses life equal to its power, then transform
him.